Horn.



J. J. DOBES.

HORN.

APPLICATIQN mu) FEB. 2. 1914.

Patented May16,1916.

rarnrrr onshore.

JOSEPH J. IDOBES, OF CHICAGO, ILLINOIS.

HORN.

Application filed February 2, 1914.

To all whom it may concern Be it known that I, JosErH J. Donns, a citizen of the United Stat-es,and a resident of Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Horns, of which the following is a specification.

The present invention relates more particularly to horns which may be secured to the exhaust pipe of aninternal combustion engine, such as is employed in automobiles, and has for its principal objects the provisionof a horn or signal by which a plurality of harmonious, blending or chordant tones may be produced, and which is of light weight, simple construction, strong and durable, of neat appearance and which will occupy comparatively small space when applied for use.

The combination of a plurality of resonant tubes grouped together and secured to a coupling member is well known in the art, and the present invention is directed more particularly to featurs of construction whereby certain disadvantages in heretofore suggested structures arising from excessive weight, cost, multiplicity of parts, lack of rigidity of parts, size, necessities of repair, etc. are overcome.

In the accompanying drawings, which form a part of this specification, I have illustrated a preferred embodiment of these improvements, Figure 1 showing a face view or side elevation of the horn complete,

Fig. 2 being an endview of the horn' complete looking directly toward the open end of the coupling, Fig. 3 being a transverse vertical section on the line 3-3 of Fig. 1, viewed in the direction of the arrows, and Fig. 4 being a similar section on the line 44 of Fig. 1.

The horn proper includes a plurality of tubular resonators 10, 11, 12 and 13, their outer end preferably being closed, as by the metallic disks 14. These resonators are preferably made of light brass tubing, and are of such length respectively as to produce tones which harmonize with each other when all are sounded at the same time; for instance, the first, third, fifth and eighth of the musical octave may thus be produced. The relative length of the several tubes required to produce any desired chord is well known to those skilled in the art; but

Specification of Letters Patent.

Patented May 16, 1916.

Serial No. 815,903.

the same may be determined by anyone by reference to any elementary work on physics. At the coupling end of the resonators a portion of the tubing is preferably cut away, as at 15, providing an edge 16 which may be bent inward slightly if found desirable, as shown in Fig. 2, thus providing a substantially straight edge adapted to break the current from the discharge ducts ornozzles and produce a tone. Such resonanttubes so cut away and indented are well known The coupling 20 comprises preferably a hollow nut-like member 21 which may be internally threaded as at 22 (Fig. 2) whereby the horn may be attached to an exhaust pipe or similar source of'fluid pressure. The hollow interior of the coupling is defined in one direction by the wall 23, which is suitably apertured whereby fluid pressure may be discharged substantially against the edges 16 of the respective'horns. In the preferred construction I provide a plurality of discharge nozzles 24, consisting preferably -of metallic tubing threaded, crimped or otherwise secured tightly in the wall 23, and having their outer portions 2% flattened somewhat so as to reduce the pressure blast to the form of a flat and thin stream more suitable for contact with the edges 16 of the respective horns. The nozzles 24:, 2 1 are so positioned that the gas or other pressure blast entering the hollow interior of the coupling will be discharged simultaneously against the edge 16 of each of the resonant tubes, thus producing the desired chord or chime effect.

The coupling 20 is provided with resonas tor-tube holding means comprising preferably a plurality of integrally formed anchoring stops or projections 25 which extend outward from the coupling in the same general direction and are otherwise arranged substantially radially with respect to a central longitudinal line passing through the coupling, asis well shown in the drawings, these projections 25 preferably having their side walls concave and so spaced from each other that the outer walls of the coupling ends of the tubular resonators and the substantially facing curved walls of the projections substantially interfit, portions of the projections 25 preferably passing around the walls of the tubes respectively to such an extent that the tubes respectively are tightly held between adjacent projections and prevented from moving in any direction at right angles to the longitudinal direction of the tubes. In other words, the resonant tubes are tightly locked between the outstanding projections 25 against all but twisting and longitudinal movement with respect to the coupling 20. Preferably rivets 26 passing transversely through the projections 25 respectively and the walls of the tubes contiguous to each thereof secure the parts tightly and firmly together against all relative movement. By these means a very strong and rigid connection is made, of very few parts, and which, owing to the coaction between the projections and the tubes, substantially defeats all tendency of the tubes to work loose. It will be noted that the central portion of the completed structure is entirely free of tube holding means, as is well shown in Fig. l wherein the reference character 28 denotes the outer surface of the wall 23 shown in Fig. 2.

The resonant tubes may be held together more rigidly in their eluster-like arrangement by means illustrated wherein metallic clamping elements or brackets 30 are held tightly upon adjacent tubes by bolts or rivets 51, each bolt or rivet also acting as a seat or spacing element for the tubes.

The coupling 20 with the projections 25 and also with suitable discharge nozzles if desired integral therewith may be made by casting the same from iron or from any other suitable metal.

Vhile I have illustrated and described a preferred construction of these improvements it will be apparent to those skilled in the art that various changes may be made therefrom without departing from the spirit of this disclosure, and all such changes are contemplated by me as fall within the scope of the appended claim.

I claim:

The combination of a plurality of cylindrical resonant tubes in a group side by side in substantially parallel relation and substantially equidistant from a central longitudinal line, a coupling for said tubes comprising a hollow nut-like portion having an integrally formed transverse wall at one end thereof, said wall being apertured for a discharge duct for each of said tubes, a discharge duct in each of said apertures and directed toward an edge in the wall of said tubes respectively, a plurality of projections integral with said nut-like portion substantially radially arranged in transverse view and extending longitudinally from said nutlike portion, each of said projections being concave longitudinally on opposite sides thereof whereby two such concave sides substantially face each other on adjacent of said projections and form retaining walls respectively on substantially circular lines in transverse view, each of said resonant tubes being between two such retaining walls, said substantially facing retaining walls respectively being relatively close together at the inner portions thereof whereby a iirm seat is formed by said walls for said tubes respectively toward the central longitudinal line of said group, the outer portions of said facing walls respectivelybeing closer together than the diameter of the circle on which they are formed, and means for holding said tubes respectively against retraction longitudinally from their respective retaining walls.

JOSEPH J. DOBES.

Witnesses:

T. D. BUTLER, M. M. KmEsAND.

Copies 01 this patent may be obtained for five cents each, by addressing the Commissioner 01' Patents, Washington, D. G. 

